CH3NH3PbBr3 quantum dots for visible wavelength photodetector applications

Dias, Sandra and Kumawat, Kishan Lal and Krupanidhi, SB (2019) CH3NH3PbBr3 quantum dots for visible wavelength photodetector applications. In: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 30 (3). pp. 3061-3068.

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Abstract

Perovskite halide materials with their salient optoelectronic features such as high absorption coefficient, large charge carrier diffusion lengths and low carrier recombination, have revolutionised the field of photodetectors. In this paper we report the synthesis of CH3NH3PbBr3 quantum dots for visible wavelength photodetector applications. Quantum dots of size 2-4.5nm were obtained. UV-Vis and photoluminescence spectroscopy revealed an optical band gap of 2.3eV. An electrochemical band gap of 2.09eV was obtained using cyclic voltammetry. CH3NH3PbBr3 quantum dots based visible wavelength photodetector device was fabricated. The time dependent photoresponse was found to be stable over several ON-OFF cycles of the lamp. We have achieved a responsivity, external quantum efficiency and specific detectivity of 6.11AW(-1), 1380.2% and 3.81x10(12) Jones under AM 1.5 G, 1 sun illumination.

Item Type:	Journal Article
Publication:	JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Publisher:	SPRINGER
Additional Information:	Copyright of this article belongs to SPRINGER
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	17 May 2019 10:10
Last Modified:	17 May 2019 10:10
URI:	http://eprints.iisc.ac.in/id/eprint/62436

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